Invalid access to memory 5.13.5

WinSCP was set to 'Keep Remote Up To Date'.
Remote machine shutdown suddenly.
WinSCP timed out (became aware the connection was lost).
After a minute or so, I clicked in the WinSCP dialog that had popped up, I clicked something like "OK" to acknowledge to WinSCP had lost the connection. Then it popped with a crash.

WinSCP 5.13.5

Error message:
Invalid access to memory.

Stack trace:
(003F2A9F) System::DoneExcept
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(00380EE0) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

(003F268C) System::HandleAnyException
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(00380EE0) System::Classes::_18201
(00045359) USER32.dll
(00036297) USER32.dll
(000353D6) USER32.dll
(000351AB) USER32.dll.DispatchMessageW

Status: all_insignificant

The problem happens rarely. I cannot reproduce it.

There were two instances of WinSCP running. Both were in a similar state of having lost the connection during 'Keep Remote Up To Date'. Only one instance of WinSCP crashed.